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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2012 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SpringXSLPersistentObjectSchemaUpdate.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.pobj;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.io.IOException;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.io.InputStream;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Properties;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import javax.xml.transform.OutputKeys;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import javax.xml.transform.Transformer;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import javax.xml.transform.TransformerException;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import javax.xml.transform.TransformerFactory;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import javax.xml.transform.stream.StreamSource;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.dellroad.stuff.xml.TransformErrorListener;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.slf4j.LoggerFactory;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.springframework.core.io.Resource;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>/**<a name="line.24"></a>
<span class="sourceLineNo">025</span> * {@link SpringPersistentObjectSchemaUpdate} that applies a configured XSL transform to the XML form of the persistent object.<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * &lt;p&gt;<a name="line.27"></a>
<span class="sourceLineNo">028</span> * The {@link #setTransform transform} property is required.<a name="line.28"></a>
<span class="sourceLineNo">029</span> *<a name="line.29"></a>
<span class="sourceLineNo">030</span> * &lt;p&gt;<a name="line.30"></a>
<span class="sourceLineNo">031</span> * See {@link SpringPersistentObjectSchemaUpdater} for a Spring XML configuration example.<a name="line.31"></a>
<span class="sourceLineNo">032</span> *<a name="line.32"></a>
<span class="sourceLineNo">033</span> * @param &lt;T&gt; type of the persistent object<a name="line.33"></a>
<span class="sourceLineNo">034</span> */<a name="line.34"></a>
<span class="sourceLineNo">035</span>public class SpringXSLPersistentObjectSchemaUpdate&lt;T&gt; extends SpringPersistentObjectSchemaUpdate&lt;T&gt; {<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>    private Resource transform;<a name="line.37"></a>
<span class="sourceLineNo">038</span>    private Properties parameters;<a name="line.38"></a>
<span class="sourceLineNo">039</span>    private TransformerFactory transformerFactory;<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span>    @Override<a name="line.41"></a>
<span class="sourceLineNo">042</span>    public void afterPropertiesSet() throws Exception {<a name="line.42"></a>
<span class="sourceLineNo">043</span>        super.afterPropertiesSet();<a name="line.43"></a>
<span class="sourceLineNo">044</span>        if (this.transform == null)<a name="line.44"></a>
<span class="sourceLineNo">045</span>            throw new Exception("no transform configured");<a name="line.45"></a>
<span class="sourceLineNo">046</span>    }<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Configure the XSLT transform as a resource.<a name="line.49"></a>
<span class="sourceLineNo">050</span>     */<a name="line.50"></a>
<span class="sourceLineNo">051</span>    public void setTransform(Resource transform) {<a name="line.51"></a>
<span class="sourceLineNo">052</span>        this.transform = transform;<a name="line.52"></a>
<span class="sourceLineNo">053</span>    }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>    public Resource getTransform() {<a name="line.55"></a>
<span class="sourceLineNo">056</span>        return this.transform;<a name="line.56"></a>
<span class="sourceLineNo">057</span>    }<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>    /**<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * Configure XSLT parameters. This is an optional property.<a name="line.60"></a>
<span class="sourceLineNo">061</span>     */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public void setParameters(Properties parameters) {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        this.parameters = parameters;<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Get the configured {@link TransformerFactory} that will be used to create the {@link Transformer}<a name="line.67"></a>
<span class="sourceLineNo">068</span>     * that will be used to actually apply the {@linkplain #setTransform configured XSL transform}.<a name="line.68"></a>
<span class="sourceLineNo">069</span>     *<a name="line.69"></a>
<span class="sourceLineNo">070</span>     * &lt;p&gt;<a name="line.70"></a>
<span class="sourceLineNo">071</span>     * This property is optional; if not specified, {@link TransformerFactory#newInstance} is used.<a name="line.71"></a>
<span class="sourceLineNo">072</span>     */<a name="line.72"></a>
<span class="sourceLineNo">073</span>    public TransformerFactory getTransformerFactory() {<a name="line.73"></a>
<span class="sourceLineNo">074</span>        return this.transformerFactory;<a name="line.74"></a>
<span class="sourceLineNo">075</span>    }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>    /**<a name="line.77"></a>
<span class="sourceLineNo">078</span>     * Set the {@link TransformerFactory} to use.<a name="line.78"></a>
<span class="sourceLineNo">079</span>     *<a name="line.79"></a>
<span class="sourceLineNo">080</span>     * &lt;p&gt;<a name="line.80"></a>
<span class="sourceLineNo">081</span>     * This property is optional; if not specified, {@link TransformerFactory#newInstance} is used.<a name="line.81"></a>
<span class="sourceLineNo">082</span>     *<a name="line.82"></a>
<span class="sourceLineNo">083</span>     * @see #getTransformerFactory<a name="line.83"></a>
<span class="sourceLineNo">084</span>     */<a name="line.84"></a>
<span class="sourceLineNo">085</span>    public void setTransformerFactory(TransformerFactory transformerFactory) {<a name="line.85"></a>
<span class="sourceLineNo">086</span>        this.transformerFactory = transformerFactory;<a name="line.86"></a>
<span class="sourceLineNo">087</span>    }<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span>    /**<a name="line.89"></a>
<span class="sourceLineNo">090</span>     * Apply this update to the given transaction.<a name="line.90"></a>
<span class="sourceLineNo">091</span>     */<a name="line.91"></a>
<span class="sourceLineNo">092</span>    @Override<a name="line.92"></a>
<span class="sourceLineNo">093</span>    public void apply(PersistentFileTransaction transaction) {<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>        // Get transform source<a name="line.95"></a>
<span class="sourceLineNo">096</span>        InputStream input;<a name="line.96"></a>
<span class="sourceLineNo">097</span>        try {<a name="line.97"></a>
<span class="sourceLineNo">098</span>            input = this.transform.getInputStream();<a name="line.98"></a>
<span class="sourceLineNo">099</span>        } catch (IOException e) {<a name="line.99"></a>
<span class="sourceLineNo">100</span>            throw new RuntimeException(e);<a name="line.100"></a>
<span class="sourceLineNo">101</span>        }<a name="line.101"></a>
<span class="sourceLineNo">102</span>        try {<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>            // Setup transformer<a name="line.104"></a>
<span class="sourceLineNo">105</span>            TransformerFactory tf = this.transformerFactory;<a name="line.105"></a>
<span class="sourceLineNo">106</span>            if (tf == null)<a name="line.106"></a>
<span class="sourceLineNo">107</span>                tf = TransformerFactory.newInstance();<a name="line.107"></a>
<span class="sourceLineNo">108</span>            Transformer transformer = tf.newTransformer(new StreamSource(input, this.transform.getURI().toString()));<a name="line.108"></a>
<span class="sourceLineNo">109</span>            transformer.setErrorListener(new TransformErrorListener(LoggerFactory.getLogger(this.getClass()), true));<a name="line.109"></a>
<span class="sourceLineNo">110</span>            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");<a name="line.110"></a>
<span class="sourceLineNo">111</span>            if (this.parameters != null) {<a name="line.111"></a>
<span class="sourceLineNo">112</span>                for (String name : this.parameters.stringPropertyNames())<a name="line.112"></a>
<span class="sourceLineNo">113</span>                    transformer.setParameter(name, this.parameters.getProperty(name));<a name="line.113"></a>
<span class="sourceLineNo">114</span>            }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span>            // Do the transform<a name="line.116"></a>
<span class="sourceLineNo">117</span>            transaction.transform(transformer);<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>        } catch (IOException e) {<a name="line.119"></a>
<span class="sourceLineNo">120</span>            throw new RuntimeException(e);<a name="line.120"></a>
<span class="sourceLineNo">121</span>        } catch (TransformerException e) {<a name="line.121"></a>
<span class="sourceLineNo">122</span>            throw new RuntimeException(e);<a name="line.122"></a>
<span class="sourceLineNo">123</span>        } catch (RuntimeException e) {<a name="line.123"></a>
<span class="sourceLineNo">124</span>            if (e.getCause() instanceof TransformerException &amp;&amp; e.getCause().getCause() instanceof RuntimeException)<a name="line.124"></a>
<span class="sourceLineNo">125</span>                e = (RuntimeException)e.getCause().getCause();<a name="line.125"></a>
<span class="sourceLineNo">126</span>            throw e;<a name="line.126"></a>
<span class="sourceLineNo">127</span>        } finally {<a name="line.127"></a>
<span class="sourceLineNo">128</span>            try {<a name="line.128"></a>
<span class="sourceLineNo">129</span>                input.close();<a name="line.129"></a>
<span class="sourceLineNo">130</span>            } catch (IOException e) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>                // ignore<a name="line.131"></a>
<span class="sourceLineNo">132</span>            }<a name="line.132"></a>
<span class="sourceLineNo">133</span>        }<a name="line.133"></a>
<span class="sourceLineNo">134</span>    }<a name="line.134"></a>
<span class="sourceLineNo">135</span>}<a name="line.135"></a>
<span class="sourceLineNo">136</span><a name="line.136"></a>




























































</pre>
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